I remember watching an episode of Myth Busters where they put a block of ballistic gel into a swimming pool and shot at it from everything between a Civil War pistol to a .50cal
Very cool to learn that the slow the FPS of the round, the further into the water it will penetrate.
I hate how the clips almost always cut off a second early. For example I really wanted to see how that bullet exits the Gel and how the gel retracts then.
From 0:00 to 9:59 the video is awesome.